Medical injector



FIG. 1 is a rear view of the medical injector;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a right perspective view thereof. 

The ornamental design for a medical injector, substantially as shown and described. 